// 经典继承
function SuperType(name) {
    this.colors = ['red', 'green', 'blue']
  }
  
  function SubType(name) {
    SuperType.call(this, name)
  }
  
  var instance1 = new SubType()
  instance1.colors.push('pink')
  console.log(instance1.colors); // ['red', 'green', 'blue']
  
  var instance2 = new SubType('启明')
  console.log(instance2.colors);
  